linux-stable.git/drivers/gpio, branch linux-2.6.33.y

gpio: cs5535-gpio: fix input direction

2010-03-15T16:06:32+00:00

commit a8a5164c297c16c2f4be776714ca47dba252cc3d upstream.

The cs5535-gpio driver's get() function was returning the output value.
This means that the GPIO pins would never work as an input, even if
configured as an input.

The driver should return the READ_BACK value, which is the sensed line
value.  To make that work when the direction is 'output', INPUT_ENABLE
needs to be set.

In addition, the driver was not disabling OUTPUT_ENABLE when the direction
is set to 'input'.  That would cause the GPIO to continue to drive the pin
if the direction was ever set to output.

This issue was noticed when attempting to use the gpiolib driver to read
an external input.  I had previously been using the char/cs5535-gpio
driver.

Signed-off-by: Ben Gardner 
Acked-by: Andres Salomon 
Cc: Andrew Morton 
Cc: David Brownell 
Cc: Mark Brown 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

gpiolib: Actually set output state in wm831x_gpio_direction_output()

2010-03-15T16:06:32+00:00

commit 3383d23d86791503559cb87837491af37469d9e5 upstream.

wm831x_gpio_direction_output() ignored the state passed into it.

Signed-off-by: Mark Brown 
Signed-off-by: Samuel Ortiz 
Signed-off-by: Greg Kroah-Hartman

gpio: adp5588-gpio: new driver for ADP5588 GPIO expanders

2010-01-11T17:34:07+00:00

Signed-off-by: Michael Hennerich 
Signed-off-by: Mike Frysinger 
Cc: Jean Delvare 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

gpiolib: fix poll(2) support reconfigure on sysfs polarity change

2010-01-11T17:34:06+00:00

Previously enabled poll(2) support on one edge was never reconfigured when
sysfs polarity change was triggered from kernel, because 'struct device
*dev' shadowed an earlier definition.

Found by sparse, which I should've run much earlier.

Signed-off-by: Jani Nikula 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

gpiolib: add support for changing value polarity in sysfs

2009-12-16T15:20:01+00:00

Drivers may use gpiolib sysfs as part of their public user space
interface. The GPIO number and polarity might change from board to
board. The gpio_export_link() call can be used to hide the GPIO number
from user space. Add support for also hiding the GPIO line polarity
changes from user space.

Signed-off-by: Jani Nikula 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

gpio: add GPIO driver for the Timberdale FPGA

2009-12-16T15:20:00+00:00

A GPIO driver for the Timberdale FPGA found on the Intel Atom board
Russellville.

The GPIO driver also has an IRQ-chip to support interrupts on the pins.

Signed-off-by: Richard Röjfors 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

gpio: fix test on unsigned in lnw_irq_type()

2009-12-16T15:20:00+00:00

The wrong test was used, gpio is unsigned and it had an off-by-one.

Signed-off-by: Roel Kluin 
Cc: Alek Du 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cs5535: drop the Geode-specific MFGPT/GPIO code

2009-12-15T16:53:28+00:00

With generic modular drivers handling all of this stuff, the
geode-specific code can go away.  The cs5535-gpio, cs5535-mfgpt, and
cs5535-clockevt drivers now handle this.

Signed-off-by: Andres Salomon 
Cc: Jordan Crouse 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: john stultz 
Cc: Chris Ball 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cs5535-gpio: request function, mask & names added

2009-12-15T16:53:27+00:00

Changed number of gpio pins to 32 (according to datasheet)

Added mask to disable some pins

Added gpio_request for checking mask and disabling special pin functions

Added pin names

[dilinger@collabora.co.uk: make printk usage consistent]
Signed-off-by: Tobias Mueller 
Signed-off-by: Andres Salomon 
Cc: Takashi Iwai 
Cc: Jordan Crouse 
Cc: David Brownell 
Cc: Alessandro Zummo 
Signed-off-by: Andres Salomon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cs5535-gpio: add AMD CS5535/CS5536 GPIO driver support

2009-12-15T16:53:27+00:00

This creates a CS5535/CS5536 GPIO driver which uses a gpio_chip backend
(allowing GPIO users to use the generic GPIO API if desired) while also
allowing architecture-specific users directly (via the cs5535_gpio_*
functions).

Tested on an OLPC machine.  Some Leemotes also use CS5536 (with a mips
cpu), which is why this is in drivers/gpio rather than arch/x86.
Currently, it conflicts with older geode GPIO support; once MFGPT support
is reworked to also be more generic, the older geode code will be removed.

Signed-off-by: Andres Salomon 
Cc: Takashi Iwai 
Cc: Jordan Crouse 
Cc: David Brownell 
Reviewed-by: Alessandro Zummo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds